Tire Size Box

275/30R24 vs 275/35R24

275/35R24 compared with 275/30R24

+3.6% diameter, 0.0" width

275/35R24 is 31.58" tall vs 30.50". More than the 3% rule of thumb, so check carefully before switching.

30.5"24" rim3.2"10.8" wide
275/30R24 (solid) compared with 275/35R24 (dashed outline), drawn to scale

With 275/35R24 tires, when your speedometer says 60 mph you are really going

62.1 mph

275/35R24 is +1.08 inches (+3.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

275/30R24275/35R24Difference%
Overall diameter30.50"31.58"+1.08"+3.6%
Section width10.83"10.83"0.00"0.0%
Sidewall height3.25"3.79"+0.54"+16.7%
Circumference95.81"99.21"+3.40"+3.6%
Revolutions per mile661.3638.7−22.7−3.4%

Speedometer difference

If your vehicle came with 275/30R24 and you fit 275/35R24, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.1 mph+1.1 mph
40 mph41.4 mph+1.4 mph
50 mph51.8 mph+1.8 mph
60 mph62.1 mph+2.1 mph
65 mph67.3 mph+2.3 mph
70 mph72.5 mph+2.5 mph
75 mph77.7 mph+2.7 mph
80 mph82.8 mph+2.8 mph

Each size on its own

Questions

Which is bigger, 275/30R24 or 275/35R24?
275/35R24 is taller by 1.08 inches (31.58" vs 30.50"). 275/30R24 is the same width.
Can I replace 275/30R24 with 275/35R24?
It is not recommended without checking carefully. The diameter difference is +3.6%, more than the 3% most shops and makers allow. It will throw off the speedometer and may affect ABS, stability control and clearance.
How much will 275/35R24 change my speedometer?
When your speedometer reads 60 mph with 275/35R24 fitted (calibrated for 275/30R24), your real speed is 62.1 mph. Your odometer will under-count miles by about 3.6%.
Will 275/35R24 lift my vehicle?
Ride height changes by half the diameter difference: +0.54 inches of ground clearance at the axle.

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